Question about 1991 GMC Sierra

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1991 GMC Sierra heater switch problem. The temp control has the arrows on the toggle that show the desired temp, but on my truck all of the arrows light up and then after a bit the panel shuts down. No way to control the temp. Fan still works. Checked the fuses and they seem fine. Unplugged the battery to try to reset the brain but no change. What should I look for?

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You need to look for a short in the wiring or either the panel itself....

what it sounds like is the panel is overheating and shutting down

Posted on Mar 25, 2011

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